I recently bought one of these Gas/Gasless MIG because I'm building a slide-on camper unit:
Sydney Tools
Bunnings and other suppliers have similar systems - some need a 15Amp power supply.
Stainless or aluminium welding were not considered.
Quite a few boilermaker mates recommended MIG over stick due to ease of use / learning. They all use MIG or TIG at work.
An auto-darkening helmet was another $100 plus $50 for gloves etc.
I learnt via hints from mates and YouTube & practiced using gasless flux wire. After 10 hours learning/practice I built some jerry can brackets and after another 5 or so hours I considered myself competent enough for the real job. I then bought gas and thinner wire and it was much easier.
You can get MIG gas from Bunnings at a fairly reasonable cost - $100 for the bottle deposit + $100 each exchange.
https://www.bunnings.com.au/coregas-...g-gas_p5910386
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